mixer



(No Model.) 2 Sheets-Sheet 1.

W. M. MIXER.

STOP 000K. No. 308,975. Patented Dec. 9, 1884.

i' i I m w I F (D M Mi gummmm J (No Model.) 2 Sheets-Sheet 2.

W. M. MIXER.

S-TOP 000K.

No. 308,975. Patented Dec. 9, 1884.

lUirn \VILLIAM M. MIXER, OF NEW' YORK,

ASSIGNOR TO MIXER & BYRNES, OF

BROOKLYN, N. Y.

STOP

COCK.

.SPECIPICATION forming part of Letters Patent No. 308,975, datedDecember 9, 1884.

Application filed October 2, 1883. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM M. MIXER, a

citizen of the United States, and a resident of a the city of New York,county of New York, and State of New York, have invented certain new anduseful Improvements in Stop- Oocks, of which the following is aspecification.

My invention is a stopcock especially adapted for use mice-machines,gas-engines,and other apparatus where it is desirable to regulate withprecision the flow of minute quantities of fluids and prevent the escapeof gas around the plug. To this end I construct the cock as hereinafterfully described, and as illustrated in the accompanying drawings, inwhich- Figure l is a front view of my improved stopcock; Fig. 2, alongitudinal section. Fig. 3 is a transverse section; Fig. 4., alongitudinal section on the line 20 10, Fig. 2, showing the plug partlyopen; Fig. 5, a detached view of the plug.

The casing or body A, of anysuitableshape, contains the longitudinalpassage m m, and is bored to receive a transverse tapering plug, 0,fitted in the usual manner. A cap, B, clamped or bolted to the casing,is recessed to receive the large end of the plug or the key and aspring, 15, that bears thereon, and tends to hold the plug in place, andcarries an annular packing, a, in a recess receiving a bearing, 1), onthe casing. The plug-opening is in line with the channel in the casing,and for part of its length, 0, corresponds in form and diameter withsaid channel, extending nearly but not quite to the opposite side of theplug, so as to leave a thin. wall or web, in which is formed the otherportion, .22, of the opening, which portion is a narrow slot taperingfrom one end to the other and parallel to the channel. m m. Thisconstruction permits the regulation of the passage of fluid through thechannel with the greatest nicety, as the plug may be turned so as toexpose only the extreme contracted portion of the opening at for thepassage of "liquids or'gas, while any additional rotary motion of theplug will but slightly increase the area of the passage in proportion tothe extent of such movement. This construction also permits the readydischarge of any matter which may accumulate to obstruct the passage,the portion a of the opening constituting a chamber to receive suchmatter from the inlet m and holding the same A until the position of theplug is reversed,when

the matter will be carried from the chamber 6 into the outlet-channel m.

Any suitable devices may be employed for turning the plug; but to permitthe same to be nicely adjusted and held into position after adjustment Iemploy a worm, E, toothed segment 13, and pointer I, and graduate thesegment, as shown in the drawings.

The worm E is upon a shaft, D, provided With a crank or hand-wheel, J,and supported by arms a, projecting from a pl ate, B,toothed to thecasing, having an annular-flange that bears upon a packing, w, andconstitutes a follower, whereby the point between the small end of theplug and body or casing is effectively packed. The toothed segment is asubstitute for the ordinary wrench, and is fitted to the angular end itof the plug or key 0, gears with the worm, andis graduated opposite thefree end of the pointer I, which is fastened at the opposite end to theplate B or casing. By turning the worm the plug may be revolved a veryslight degree, so as to enlarge or reduce the liquid or gas passage asgradually as may be desired, and the worm serves to lock the plug in anyposition to which it is set.

It will be seen that the plate I and cap B are each connected to thecasing or body A i by a packing, and are secured and held by boltspassing throughboth. This construction insures a tight joint around thevalve, and hermetically seals it so as to prevent the escape of anyfluid or gas around the plug, and at the same time the angular end ofthe plug is open for the wrench or segn'ient.

I claim l 1. The combination of a casing, channel, and transverse plughaving an inlet-chamber, at one side and a contracted exit-passage, 95,at the opposite side, substantially as described.

2. The combination,with the casing having a channel, of the tapered plughaving a chamher in one side and acontracted opening in the other, theplate and cap secured to the easing by air or gas tight joints, thesegments secured to the end of the plug, and the worm and pointer,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

VILLIAM M. MIXER. Vitnesses:

WM. A. POLLOOK, Gno. H. Evans.

atent No. 308,975.

It is hereby certified that in Letters Patent N 0. 308,975, grantedDecember 9, 1884, upon the application of William M. Mixer, of New York,New York, for an improvement in Stop-Cocks, the name of the assignee waswritten and printed Mixer &

Byrnesf that said name should have been ritten and printed Mixer (EMachine Company; records pertaining to the case in the Patent Office,and should be read in the Letters Patent to make it conform thereto.

sealed this 23d day of December, A. D. 1884. d

M. L. JOSLYN, Secretary of the Interior.

Signed, countersigned, and

[SEAL] Acting Oountersigned:

BENJ. BUTTERWORTH,

' Commissioner of Patents.

